Consistency responsive device



Feb. 27, 1940. H. s. HARCOURT CONSISTENCY RESPONSIVE DEVICE Filed April 28, 1937 INVENTOR. Han Ha read 77'' ATTORNEY.

Patented Feb. 27, 1940 UNITED STATES PATENT OFFICE 2 Claims.

This invention relates generally to consistency responsive devices and more particularly to pulp stock consistency responsive devices.

All apparatus of this character, made according to the prior art and with which I am familiar, have been very inefficient and it permitted many variations in the final paper product. Apparatus has been designed responsive to the consistency of the stock, but this apparatus has been found to be impractical in that it would not solve the problem of producing a uniform consistency of the paper stock automatically. Much loss has resulted heretofore because of the consistency of the paper stock being too thick. The

consistency of the paper stock directly affects the thickness, density, porosity, bulk, drying,. finish and color of the final paper product, therefore making it very important that a uniform consistency of pulp stock be maintained.

It is accordingly an object of my invention to overcome the above and other defects in consistency responsive devices and it is more particularly an'object of my invention to provide a pulp stock consistency responsive device which is automatic in operation, simple in construction, easy to install and maintain, cheap in cost, and eflicient inoperation.

Another object of my invention is to provide a pulp stock consistency responsive device which tends to insure uniform thickness, density, porosity, bulk, drying, finish and color in the final paper product.

Other objects of my invention will become evident from the following detailed description, taken in conjunction with the accompanying drawing in which Fig. 1 is a side elevational view partly in section showing my control apparatus installed in a trough through which paper stock is passing, arrows being provided to indicate the direction of flow of the stock.

Fig. 2 is a view taken on the line 2-2 of Fig. 1.

Fig. 3 is a view taken on the line 3-3 of Fig. 2.

Fig. 4 is a view taken on the line 44 of Fig. 2.

Referring to the drawing, Fig. 1 shows a supply box I with a penstock or trough 2 leading therefrom and into an outlet 3 leading to a refining machine (not shown). It will be evident that this outlet 3 may lead to any other machine or apparatus other than a refining machine without departing from the spirit of this invention. A gate 4 is disposed transversely in the trough 2 and is hingedly connected to a shaft 5 secured in place by threaded nuts 6. An inverted V- shaped opening 'I is disposed in the lower portion gate 9 moves vertically in the guiding flanges 8 and extends downwardly to a position shown by the dotted lines in Fig. 2. A screw threaded shaft ll attached to the sliding gate 9 passes through an aperture 12 in the support l3 and is engaged by a wing nut I4 to raise or lower the sliding gate 9 relative to the gate 4 to vary the size of the opening I in the gate 4. It will be apparent that any suitable means may be provided for moving the sliding gate 9 vertically. 20 The vertical movement of the sliding gate 9 causes the gradual opening or closing of the V-shaped opening I in the gate 4. After gate 9 has been adjusted, gate 4 will change in position with the intensity of the paper stock and 25 operate water valve'l8 accordingly. Gate 9 is adjusted to give a, desired position of gate at for any selected density; therefore, the consistency of the stock remains substantially constant and gate 9 is adjusted to give a desired position of gate 4 for any selected density.

An arm I5 is rigidly connected to the shaf 5 and moves in a vertical plane upon rotation of the shaft 5 to raise or lower the link I6 which is attached to a lever I! which controls a valve I 8 35 in the feed water line l9. The feed water line I9 leads to the trough 2 to mix with the paper stock passing therethrough. The valve l8 controls the water supply through feed line I9. The amount of water which passes through the feed 40 line l9 to the trough 2 is controlled by the valve l8 which in turn is actuated an amount proportionate to the angle that the gate 4 makes with the surface of the fiowingstock, the swinging of the gate 4 causing the movement of arm I5, 45 link l6, and lever IT to open or close the valve I8 a predetermined amount, the swing of the gate 4 and amount of water required being dependent upon the consistency of the paper stock desired.

In operation, the consistency of the stock desired is first determined and the sliding gate 9 is raised or lowered to the desired position. After the apparatus is set for a predetermined consistency of paper stock, if the paper stock be- 2 ares-pee comes too thick it causes the gate 5 to imme diately swing away in the direction of flow of the stock thereby causing the upward movement of the arm l5 and link l6 and lever H to open 5 the valve I 8 a predetermined amount in accordance with the angle which the gate t makes with the surface of the flowing stock. The valve it permits a predetermined amount of liquid to pass through the feed line E9 to the trough 2 in where the stock is passing through, the amount of water added being proportionate to the swing of the gate d and the opening in the valve IS. The stock therefore leaves the trough 2 and passes through the outlet 3 to a refining magg chine uniform in consistency resulting in a uniform thickness, density, porosity, bulk, drying, finish, and color of the final paper product.

It will be apparent that this apparatus may be used to control the consistency of any form of stock in a liquid form and this invention is not necessarily confined to paper stock although that is the preferred use of this invention.

Applicant has provided a consistency regulator for stock in a liquid form which is simple in construction, cheap in cost, and very effective and efllcient in performing the function of regulating the consistency of the stock which it is in contact thereby providing a uniform final prodnot and in the preierred use a uniform final paper product.

various changes may be made in the specific embodiment of the present invention without departing from the spirit thereof, or from the is scope of the appended claims.

What I claim is:

1. A pulp stock consistency responsive device comprising a trough, a pulp supply box for said trough, a hinged gate disposed in said trough in having an inverted V-shaped opening. an adjustable sliding gate movable relative to said hinged gate, having an inverted V-shaped openmg coinciding with the said v-shaped opening in said hinged gate, and means operable by the ll swinging of said gate when the consistency of said stock varies.

2. A pulp stock consistency responsive device comprising a passageway, a pulp supply box for said passageway, a swinging gate disposed in said 50 passageway having a, v-shaped opening, manually operated means movable relative to said swinging gate having a V-shaped opening coinciding with the v-shaped opening in said swinging gate for varying the area of said swinging 1| gate in the path of moving stock, and means controlled by the swinging movement 01' said gate when the consistency of the stock varies.

HARRY 8. HARCOURT. 

